<nav class="navbar navbar-inverse navbar-fixed-top">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle show pull-left" data-target="sidebar">
					<span class="sr-only">Toggle navigation</span> <span
						class="icon-bar"></span><span class="icon-bar"></span><span
						class="icon-bar"></span>
				</button>
      <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#navbar" aria-expanded="false"
        aria-controls="navbar">
					<span class="sr-only">Toggle navigation</span> <span
						class="icon-bar"></span><span class="icon-bar"></span><span
						class="icon-bar"></span>
				</button>
      <a class="navbar-brand">Asystem-backend</a>
    </div>
    <div id="navbar" class="collapse navbar-collapse">
      <ul class="nav navbar-nav">

      </ul>
      <ul class="nav navbar-nav navbar-right">
        <li class="dropdown"><a class="dropdown-toggle" data-toggle="dropdown" role="button" aria-expanded="false"><i
							class="fa fa-user fa-fw"></i>&nbsp;admin&nbsp;<span class="caret"></span></a>
          <ul class="dropdown-menu" role="menu">
            <li><a href="">退出登录</a></li>
          </ul>
        </li>
      </ul>
    </div>
  </div>
</nav>